Petrofac’s chief financial officer will leave the oil service company after being poached by security group G4S.
Tim Weller will vacate his post at Petrofac in October 2016.
Petrofac said today the search for his successor was under way.
Petrofac chief executive Ayman Asfari said: “I would like to thank Tim for his significant contribution over the past five years.
“Over this time the group has gone through substantial strategic change and Tim’s experience, professionalism and measured approach have proven invaluable in helping us on our journey back to our traditional areas of focus.
“We wish Tim well in his new role with G4S.”
Weller said: “I have thoroughly enjoyed my time at Petrofac and the decision to leave was not an easy one.
“With Petrofac’s renewed focus on its core strengths, I am confident that Ayman and the team will lead the group to success.
“However, the opportunity to join G4S and an executive team that I have come to know and admire through my non-executive role with the company, is the right move for me at this time.”
Petrofac’s previous boardroom reshuffle came in July when it appointed Dave Blackburn, a former director at Hess Corporation, as senior vice president of engineering and operations.